Fabri, Honoré, Dialogi physici in quibus de motu terrae disputatur, 1665

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15[Figure 5]
Sit
igitur centrum mundi A, Axis
mundi
BC, diameter Æquatoris KF,
diameter
Tropici Cancri ID, Capri­
corni
LH, Apogæum D, Perigæum L,
mediocris
diſtantia AQ, quæ diſpo­
ſitio
fortè fuit anno mundi 5400. Sit
angulus
obliquitatis Zodiaci DAF,
item
HAF, ſupponamus Solem in
Apogæo
cum tali velocitatis gradu,
quo
circa Axem mundi æquabili mo­
tu
ſuum orbem diurnum decurrit ab
Ortu
ad Occaſum, cum duplici in­
clinatione
, altera ſcilicet versùs
centrum
A, ad inſtar motus accelerati,
vſque
ad mediocrem diſtantiam, &
retardati
ab hac ad Perigæum, atque
ita
deinceps; altera verò versùs E, ad
inſtar
pariter motus accelerati vſque
ad
Æquatorem, & retardati ab Æqua­
tore
ad Tropicum, atque ita deinceps;
cùm
autem circuli ſint, vt diametri,
vel
ſemidiametri, erunt orbes decur­
ſi
, ſi tamen decurruntur orbes, vt B
D
, AQ, CH; & cùm AQ, ſit haud
dubiè
major, quàm BD, maximus
circulus
decurritur circa Æquatorem
quod
certè in hac hypotheſi ſingulare non eſt, cùm etiam in Ptolemaica,
& Tyconica locum habeat Dixi, cautè, ſi tamen decurrantur orbes, quia
orbes
non decurruntur, ſed ſpiræ, quæ ita componuntur, per majorem aut
minorem
diſtractionem, vt ſingulæ æquales ferè ſingulis evadant, dico
ferè
, quia non nego, aliquam ineſſe inæqualitatem, vt ſupra dictum eſt.
Finge igitur, ſepoſito motu circulari, Solem duplici inclinatione, eo modo,
quo
ſuprà dictum eſt, inſtructum, ite, ac redire, tum versùs centrum mun­
di
A, tum à D ad E per arcum DE, & vtraque ſuo gaudeat acceſſu &
receſſu
; hoc quidem motum retardatum, illo verò acceleratum imitante,
ſitque
menſura acceſſus primæ inclinationis FQ, vel EV, & receſſus VH;
Secundæ
verò, acceſſus DF, & receſſus FE, atque ita viciſſim; finge igi­
tur
, inquam, Solem ita moveri, ſepoſito motu circulari diurno; ibit haud
dubiè
per lineam curvam DQH.

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